Develop Bugs

[Q] Can't change into download mode LG G3 D855

Hey Guys,
I want to flash the stock rom on my LG G3 D855, but somehow lgflashtool cant change into download mode. I tried to flash with the .kdz file but it doesnt work either.
And now my phone is stuck in the firmwarte update screen. I cant do anything when I try to turn it on it just goes back into the firmware update screen. I tried to do the hardreset with the buttons but it doesnt work.
Can someone please help ?
EDIT: Hey guys I solved the problem by returning it to telekom (my carrieer) and they send me a new LG G3 on the next day. But when I tried to flash my G3 with the .kdz method I didnt put the .kdz file into the same folder as the LGFlashTool, maybe that was the reason why it didnt work.

Khoalition said:
Hey Guys,
I want to flash the stock rom on my LG G3 D855, but somehow lgflashtool cant change into download mode. I tried to flash with the .kdz file but it doesnt work either.
And now my phone is stuck in the firmwarte update screen. I cant do anything when I try to turn it on it just goes back into the firmware update screen. I tried to do the hardreset with the buttons but it doesnt work.
Can someone please help ?
Click to expand...
Click to collapse
did you install all the drivers needed?
http://forum.xda-developers.com/lg-g3/general/flashing-guide-to-lg-t2825369

vak20 said:
did you install all the drivers needed?
http://forum.xda-developers.com/lg-g3/general/flashing-guide-to-lg-t2825369
Click to expand...
Click to collapse
Yup tried everything.

Khoalition said:
Hey Guys,
I want to flash the stock rom on my LG G3 D855, but somehow lgflashtool cant change into download mode. I tried to flash with the .kdz file but it doesnt work either.
And now my phone is stuck in the firmwarte update screen. I cant do anything when I try to turn it on it just goes back into the firmware update screen. I tried to do the hardreset with the buttons but it doesnt work.
Can someone please help ?
Click to expand...
Click to collapse
I have the same Problem and I also have installed the drivers. please help

smiloradovic said:
I have the same Problem and I also have installed the drivers. please help
Click to expand...
Click to collapse
be sure NOT to use usb 3 port

my laptop has only usb 2 ports and i tried all usb ports and i get the error every time

smiloradovic said:
my laptop has only usb 2 ports and i tried all usb ports and i get the error every time
Click to expand...
Click to collapse
What method did you use?
If you used the .kzd method (http://forum.xda-developers.com/showthread.php?t=2785089) dont forget to put the .kdz file in the same folder as the LGFlashTool
If that doesnt work, you should go and replace it.

Khoalition said:
What method did you use?
If you used the .kzd method (http://forum.xda-developers.com/showthread.php?t=2785089) dont forget to put the .kdz file in the same folder as the LGFlashTool
If that doesnt work, you should go and replace it.
Click to expand...
Click to collapse
I solved it. I took a friends laptop and tried it on it. In 5 min we were done but thank you.

LG G3 Can't change to download mode
Khoalition said:
Hey Guys,
I want to flash the stock rom on my LG G3 D855, but somehow lgflashtool cant change into download mode. I tried to flash with the .kdz file but it doesnt work either.
And now my phone is stuck in the firmwarte update screen. I cant do anything when I try to turn it on it just goes back into the firmware update screen. I tried to do the hardreset with the buttons but it doesnt work.
Can someone please help ?
EDIT: Hey guys I solved the problem by returning it to telekom (my carrieer) and they send me a new LG G3 on the next day. But when I tried to flash my G3 with the .kdz method I didnt put the .kdz file into the same folder as the LGFlashTool, maybe that was the reason why it didnt work.
Click to expand...
Click to collapse
having same problem with my LG G3 D850 .... currently running on custom rom I want to install stock rom http://storagecow.eu/index.php?dir=Xda/LG+G3/Stock/AT&T+D850/
but it gives me error Can't change to download mode .... Can see in (picture)

[Q] Stuck at fast boot LG G3 F400L

Hi all,
Long time user first time posting a thread [sorry couldn't help myself]
Anyway I have a LG G3 F400L and I accidentally installed D855 rom on to it [AndroidNow_HD_8.0_Lollipop].
I have tried flash tool to flash the correct firmware but to no effect it now detects it as D855, so I cant install the F400L firmware using the F400L dll. I am installing an older firmware i.s 10e I have also tried 20f for F400L but the new flash tool doesn't recognize my phone, I have tried different USB ports and a different PC with Windows 7 32bit still nothing.
I am using Windows 8.1 64bit.
Regards and thank you for the help.

Anyone, please help.

Use cwm or any other recovery backup to restore

akashvermaofskt said:
Use cwm or any other recovery backup to restore
Click to expand...
Click to collapse
Thank you for the response. I do not have access to recovery, only download mode works.
Update: I have tried using a general Dll to flash TOT file via flashtool but it doesn't let me error CrossDl [D855] to [F400L].

I had this and I set for 4 hours figuring out how to fix it. ( I had not accsess to the download mode first only to hard reset which didn't work and the "Fastboot mode started")
If you have access to the Download mode that's perfect, Follow this Tut:http://lgg3root.com/lg-g3-root/how-to-unrootunbrick-lg-g3/
Please make sure you download the correct TOT file for your phone.
http://downloadandroidfiles.org/Files/LG G3/Stock Files/

SaharLevi said:
I had this and I set for 4 hours figuring out how to fix it. ( I had not accsess to the download mode first only to hard reset which didn't work and the "Fastboot mode started")
If you have access to the Download mode that's perfect, Follow this Tut:
Please make sure you download the correct TOT file for your phone.
Click to expand...
Click to collapse
Thank you that did work sort of, I was doing the same thing but someone in the comments referred to a modded DLL for the flash which did the job to some extent at least.
Its back to stock but stuck at McAfee activation, requires a pin which I do not have nor have ever created one, and now a Kill switch has been engaged and no more download mode. Out of the fire into the frying pan is what I feel like right now 100hours and 33mins without my G3, but who is counting.

That's sucks where did the McAfee activation came from??
Have you tried a hard reset ? or can you access the fastboot mode again ?

SaharLevi said:
That's sucks where did the McAfee activation came from??
Have you tried a hard reset ? or can you access the fastboot mode again ?
Click to expand...
Click to collapse
Nothing, no download mode or recovery. Boots up asks for language selection and then McAfee pops up of PIN. I am talking to McAfee support hopefully they can help.

Goodluck with that!

Thank you all.
Finally fixed. Just needed to be quick, the McAfee app gives you about 30 secs to do your thing then it pops up for pin. I opened up the McAfee app -> setting and changed the pin .

[Solution] if you flashed the wrong firmware on your LG G2

First of all I want to Thank cybertag (a member at reddit.com) whose help made me find this solution. And sorry if my English is not good, it is not my first language. As I don't have enough posts here, XDA restricts me to post external links so this is the best I could do. I will add links to the files needed once i am allowed.
A few days ago I was tinkering with after my lg g2 ls-980, the sprint version of lg g2, rooted but no custom recovery installed and I made my first mistake of changing the model number from ls-980 to D802 in built.prop file thinking that it will only change the model number shown in the hardware information and restarted the phone. Once my phone booted up after that restart everything was crashing. There was a huge number of crash reports popping on the screen and I was not able to use anything. So I downloaded the .tot files of the stock firmwares LS980ZVC and LS980ZVE (don't know why but I downloaded both) along with the .dll file needed to flash the firmware for ls980 and when I tried to flash the firmware booting the phone in download mode and using the LG Flash tool but it gave me an error saying that the firmware does not match with model number of my phone. Both firmwares gave the same error. My phone and the flash tool both were thinking it was D802 while it was not.
Now i made my second mistake and downloaded the stock firmware for D802 and flashed it using LG flash tool. The firmware was flashed successfully without any error, but when the phone booted up after the flash the touch screen was behaving funny and phone restarted every 15-20 seconds because this firmware was not meant to be used with LS-980. I was unable to do anything the way touch screen was behaving.
I spent most of my time for the next few days googling for the solution and searching on XDA and also on reddit. I found multiple threads reporting that a generic no-check DLL file is the savior in this situation, but when I tried to run it I get continuous errors telling me the following: "CrossDL [D8012] to [LS-980]". Then i found this thread by cybertag on reddit which lead me to the right direction. It suggested to hex edit the .tot file for ls-980 so that the flash tool thinks that it is for D802. So I grabbed a hex editor and found the first mention of LS-980 and changed it to D802, saved the file and tried o flash it but it was still giving different errors. Then someone suggested it only works if you edit the .tot firmware in linux based OS. So i installed ubuntu OS on a virtual machine and tried editing the firmware in that OS using Bless Hex editor, still no success in flashing. Then I tried editing in pinguy OS but in vain. Then I found FlexHex for windows and used it for editing the LS980ZVC.tot firmware did the same thing, found the first mention of LS-980 and changed it to D802, saved the file, flashed it and bingo! the flash tool gave no error this time and flashed the phone successfully.
Now there was another problem. When the phone rebooted after flashing the firmware it got stuck on LG logo forever. And when I tried to boot it into download mode, the download mode was gone and it took me to fastboot mode. The phone was stuck in bootloop and there was no download mode anymore. Now after more searching i found a method to resolve this problem. Downloaded the aboot.img and laf.img partitons for LS980ZVC and flashed both using fastboot commands. Tried to boot into the download mode again and it worked and i was in download mode one again. When I checked the phone model was changed back to LS-980, the original one. Flashed the LS980ZVE firmware from original .tot file as it was the latest version available to date and it flashed without any error. When the phone rebooted after completing the flashing process, it was as good as new, up and running the original stock kitkat rom for this model. Tested and tried everything and never noticed any issue.

Thank you @tauheed that will help a lot of people I'm sure.
Thank reddit member cybertag out there to.

please help
Hi sir!
i think i got just the problems with yours, but i not sure how to get my phone into fastboot mode no matter how many i press the [power+volume up] it just start up and stay at lg logo screen forever.
Can you explain how to get my LS980 into fastboot mode step by step, if i can put it in fastboot mode, i think i can fix it. please help

secret.animal said:
Thank you @tauheed that will help a lot of people I'm sure.
Thank reddit member cybertag out there to.
Click to expand...
Click to collapse
First of all, i'm sorry for my bad english.
i having the same problems as him. my LS980 is stuck at LG logo screen (not rebooting) it just stay there forever!
when i tried to boot it into download mode, at first i thought gonna successfully boot into download mode, but it DID NOT.
Please refer to my picture below to get better understanding what i'm trying to explain and again i'm sorry for my bad english.
My pc can detect my LS980 but not in fastboot mode, i mean if i try to boot into download mode then my pc won't detect it.
I really NEED some videos if possible of how to fix this, a million thanks!!!

[email protected] said:
Hi sir!
i think i got just the problems with yours, but i not sure how to get my phone into fastboot mode no matter how many i press the [power+volume up] it just start up and stay at lg logo screen forever.
Can you explain how to get my LS980 into fastboot mode step by step, if i can put it in fastboot mode, i think i can fix it. please help
Click to expand...
Click to collapse
what happens when you try to boot in to download mode?
it it stuck at download mode or something else happens?

Looks to be stuck with a broken download mode. His laf partition is broken.

tauheed90 said:
what happens when you try to boot in to download mode?
it it stuck at download mode or something else happens?
Click to expand...
Click to collapse
its just stuck like the picture that i attached below . it won't go any future.
Can you help fix this?
or what can i do to fix it?
i got a LG G2 LS980

secret.animal said:
Looks to be stuck with a broken download mode. His laf partition is broken.
Click to expand...
Click to collapse
hi m8, do you know how can i fix this?
please i really need some HELP over here, thank for reply

I'm looking into seeing how we can replace that laf partition that is broken. So we can fix this.

secret.animal said:
I'm looking into seeing how we can replace that laf partition that is broken. So we can fix this.
Click to expand...
Click to collapse
it sound like i'm in big problem right?
i'm total noob with this, sorry.

[email protected] said:
it sound like i'm in big problem right?
i'm total noob with this, sorry.
Click to expand...
Click to collapse
No problem, this is how we learn. One from the broken side and one from the fixing side. It's all good.

[email protected] said:
it sound like i'm in big problem right?
i'm total noob with this, sorry.
Click to expand...
Click to collapse
the only possible option is to flash the aboot.img and laf.img partitions. But we need to find a way to do so in your phone's current state. Things can be a lot easier if you could manage to get into fastboot mode.

tauheed90 said:
the only possible option is to flash the aboot.img and laf.img partitions. But we need to find a way to do so in your phone's current state. Things can be a lot easier if you could manage to get into fastboot mode.
Click to expand...
Click to collapse
Please help me out! i already bricked it for nearly 1 month already T_T

helo sir i am on window 7 i dont know how to edit modal number from hex can you please post a screen shots, i will be thanful to you plz sir help me otherwise my best will be just a plastic piece

i have wrongly flash lg g2 ls980 to d802 because the phone was refurbished
now phone is reboot and imei and baseband is unknown
so i am trying ur method but what do i have to edit in the hex editor
in flastool imei is getting shown but flash fails
please reply need urgent help

secret.animal said:
No problem, this is how we learn. One from the broken side and one from the fixing side. It's all good.
Click to expand...
Click to collapse
dear sir, i have lg d802 or d800, i dont know exactly bcoz seller sold me as d802.when i flashed stock kdz of d802 , its touch screen start weired behaviour, sometime stop reposnding or some thime i touch some thing else but some thing else selected.to check i opened the back of phone, its touch strips were written with d800 /801 and 803. but d800 was marked.so i flashed d800 tot file.after flashing phone boot but in boot loop.i can enter stock recovery to hard reset, but after that still boot loop.i can access download mode, but pc do not detect phone in download mode.when i power on in normal way than device manager shows modem and lg android net. but in download mode no detection.
what can i do in this situation? do this short capacitor method will work for me? or what else i can do to get it to life again,
plz waiting for response . it is same like attached pic of download mode in starting page of this thread

afzalcool said:
i have wrongly flash lg g2 ls980 to d802 because the phone was refurbished
now phone is reboot and imei and baseband is unknown
so i am trying ur method but what do i have to edit in the hex editor
in flastool imei is getting shown but flash fails
please reply need urgent help
Click to expand...
Click to collapse
majid.ayub999 said:
helo sir i am on window 7 i dont know how to edit modal number from hex can you please post a screen shots, i will be thanful to you plz sir help me otherwise my best will be just a plastic piece
Click to expand...
Click to collapse
You have to edit the first mention of the model number in the hex editor. Don't mess with anything else.

i was able to sole the problem.

have you found any solution?
[email protected] said:
its just stuck like the picture that i attached below . it won't go any future.
Can you help fix this?
or what can i do to fix it?
i got a LG G2 LS980
Click to expand...
Click to collapse
Have you found any solution to this problem?
I am the same problem as yours with another phone I have. It is a D800 which was wrongly flashed to D802. After flashing the D800 firmware with the model name edited, it is stuck on LG logo and it won't go to download mode either.

Not yet. I'm still waiting...total dead phone now.

LG G4 H81010o AT&T "Secure booting Error 1006" and "bleu led"

Hello,
I got the LG G4 H810 (H81010o AT&T) and I tried to flash it whit a rom but somthing goes wrong.
Now when I boot my phone I got directly the message blew and even the LG Logo don't appear.
[700]--------------------------------------------------------
[750]
[800] Secure booting Error!
[850] Error Code : 1006
[900] OFFICIAL !!
[950]
[1000]--------------------------------------------------------
I manage to install TWRP but i can't install a rom or I don't know how.
Can someone please help me ?
Thank you very much,
imider

imider said:
Hello,
I got the LG G4 H810 (H81010o AT&T) and I tried to flash it whit a rom but somthing goes wrong.
Now when I boot my phone I got directly the message blew and even the LG Logo don't appear.
[700]--------------------------------------------------------
[750]
[800] Secure booting Error!
[850] Error Code : 1006
[900] OFFICIAL !!
[950]
[1000]--------------------------------------------------------
I manage to install TWRP but i can't install a rom or I don't know how.
Can someone please help me ?
Thank you very much,
imider
Click to expand...
Click to collapse
these devices have locked bootloaders. how did u install twrp?
best bet would to be to find what ever firmware device was on and reflash it with lg up or flash tool if u still have download mode.

Thanks for your reply.
I really don't know what i did to install twrp.
I try to use flash tool but doesn't detect my phone.

imider said:
Thanks for your reply.
I really don't know what i did to install twrp.
I try to use flash tool but doesn't detect my phone.
Click to expand...
Click to collapse
With flash tool goto device manager on pc.
click ports and com get into settings on it and change com port to 41
and have device in download mode powered off volume up + insert usb cord from pc

@imider I have the same problem trying to recover from a hardbrick on H815. Tell me what happens if you pull battery, plug bag, hold VOL DOWN and insert USB. Do you get fastboot?
EDIT: You might be able to flash it in FlashTool (I said no before) because I see you have Official Status not MODIFIED.

Thanks for your reply guys.
I manage to flash it with LGUP with a TOT that I downloaded.
Thanks.
:good::good::good::good::good::good:

imider said:
Thanks for your reply guys.
I manage to flash it with LGUP with a TOT that I downloaded.
Thanks.
:good::good::good::good::good::good:
Click to expand...
Click to collapse
Congrat @imider ,
maybe you can share what you did to fix your G4

Hello,
First I wanted to flash a clean rom on LG G4 H810 and I don't know what I did but the flash doesn't work and my phone has a black screen even the logo is not displayed.
When I connect my phone to my PC (windows 10) it's detected as "Qualcomm HS-USB QDLoader 9008".
Now this is the step that I follow to repair my phone :
1) I follow this tuto : https://forum.xda-developers.com/g4/help/lg-g4-bricked-qualcomm-hs-usb-qdloader-t3609999
2) After that I can enter download mode
3) I flashed a tot with LGUP
I hope it will help.

lg g4
Hi. I have lg g4 h81010o android 5.1. I put custom firmware and decided to fix build.prop. after that it at me didn't turn on. and I accidentally flashed it with another firmware.through qfil I restored the com port..but the LGUP program doesn't define my model..driver changed and LGUP version does not help. I think it's because I changed in build.prop..please help me find a solution

LG Bridge for software reinstall

Hi all,
I was wondering, once I have custom firmware and recovery on my lg g4, will I be able to reinstall the software from LG Bridge. I understand that I could use the kdz downloaded by it in LG UP, but I was wondering, if I put my phone in download mode, could the update error recovery utility in LG Bridge also reinstall it?
Thanks in advance for your help

ThePiGuy said:
Hi all,
I was wondering, once I have custom firmware and recovery on my lg g4, will I be able to reinstall the software from LG Bridge. I understand that I could use the kdz downloaded by it in LG UP, but I was wondering, if I put my phone in download mode, could the update error recovery utility in LG Bridge also reinstall it?
Thanks in advance for your help
Click to expand...
Click to collapse
I tried this recently just to see what it does, but it even didn't recognize the phone. So you probably need to use LGUP (which I used to go back to stock on my G4) or TWRP to flash something else.

SuperBommel said:
I tried this recently just to see what it does, but it even didn't recognize the phone. So you probably need to use LGUP (which I used to go back to stock on my G4) or TWRP to flash something else.
Click to expand...
Click to collapse
I just tried it and interestingly if the phone is in download mode, it does get recognized as an LG device and will initiate an Update Error Recovery